Ring spanner

Abstract

The invention relates to a ring spanner, which belongs to the technical field of spanners of hand tools, and particularly relates to a tool which can realize reciprocating continuous screwing. A screw is used as a rotating shaft, a pawl acts on the outer surface of the screw, the screw is seized under the combined action of a tong arm, a ring sleeve and the pawl, and then a torque is applied to the screw under the rotary action of the tong arm. During rotation, the tong arm rotates so as to drive the pawl to rotate outside the radius, so that the space required when the screw rotates is left. By adopting the tool, the screwing and gripping problems of large-size screws are mainly solved. Especially, for narrow space, conventional pipe tongs and spanners cannot meet the size requirement during screwing, or the conventional pipe tongs and spanners are limited to the space and cannot operate. By adopting the tool, the continuous screwing and gripping problems of the narrow space are mainly solved. Of course, the ring spanner is suitable for being used in places of which the space is not limited. For different screws, corresponding ring sleeves are matched and replaced, so that the screws of different sizes can be screwed.

Description

technical field [0001] The design of the invention belongs to the technical field of hand tool wrenches, specifically a tool capable of realizing continuous twisting and buckling, and is mainly aimed at turning and tightening large-sized screws. [0002] Large-sized screws are often relatively concentrated and the space is small. Existing tools, such as conventional pipe wrench and wrench, want to achieve efficient operation during the twisting process, but they are often either out of size or limited by space and cannot be used. This tool solves this problem very well, and can realize continuous reciprocating twist buckle in a narrow space, and can reach a certain torque value. In the process of use, the timeliness is greatly improved, and the labor intensity of personnel is well reduced, thereby creating value. The present invention can well solve the quick make-up, break-out and pre-tighten work of large-size bolts used in petroleum industry, heavy machinery and large-scal...

AI Technical Summary

Problems solved by technology

[0003] Taking the petroleum industry as an example, it is often necessary to use large-sized screws in the industry, such as the fastening between well sealing devices and the fixing of the derrick. In this process, or when the screw needs to be unscrewed after the torque is removed, conventional tools are either limited in size or the operating space is difficult to play a role

Now the tools that manufacturers are equipped with are generally hydraulic torque wrench and hammer wrench. The two have no problem in tightening and unloading the torque. Both have inherent disadvantages: the hydraulic wrench itself has a large weight, it is laborious to disassemble, the rotation speed is very slow, and the efficiency is very low. The hammer wrench needs to be disassembled repeatedly, and its quality is not light, especially for large-sized screws. The labor intensity of personnel is high

Although the traditional wrench ratchet can rotate continuously, it can only bear a small torque, and it is also suitable for relatively small screws.

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